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Abridged by the author from "The Encyclopedic Book on Secret Codes". — The history of secret codes--and the men who have created and broken them with dramatic consequences for the world! — Comprehensive and astounding...utterly fascinating to anyone interested in political or military history, mathematics, mystery or pure who-dun-it....Beginning w... more »ith hieroglyphics and ending with computers, David Kahn has produced an anthology of a hundred detective stories, one more ingenious than the last, and all real, central to the fate of armies and kingdoms.« less